Astro*Dictionary by Michael Erlewine
2 articles for "Radius Vector"
Radius Vector [Astro*Index]A line drawn from the focus of an ellipse to an orbiting body; e.g. a line drawn from the Sun to a planet.
Kepler's second law states that even though planets speed up and slow down, the radius vector sweeps over equal areas in equal times.
See also:Radius Vector [Munkasey M.]
♦ Kepler's Laws ♦ Ellipse
This is a line which gives the length and bearing ofan arrow of direction from the center of a sphere outwards.
See also:
♦ Ellipse
Astro*Index Copyright © 1997 Michael Erlewine